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Parameters affecting the occurrence of quicksand and the drying up of large diameter wells that gain water from the bottom: a case study from Iran

Hydrogeology journal, 2009-07, Vol.17 (5), p.1175-1187 [Peer Reviewed Journal]

Springer-Verlag 2008 ;Springer-Verlag 2009 ;ISSN: 1431-2174 ;EISSN: 1435-0157 ;DOI: 10.1007/s10040-008-0426-7

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  • Title:
    Parameters affecting the occurrence of quicksand and the drying up of large diameter wells that gain water from the bottom: a case study from Iran
  • Author: Kompani-Zare, Mazda ; Samani, Nozar ; Behrooz-Koohenjani, Siavash
  • Subjects: Aquatic Pollution ; Aquifers ; Earth and Environmental Science ; Earth Sciences ; Geology ; Geophysics/Geodesy ; Groundwater flow ; Hydrogeology ; Hydrology ; Hydrology/Water Resources ; Inverse modeling ; Large diameter well ; Quicksand ; Simulation ; Waste Water Technology ; Water Management ; Water Pollution Control ; Water Quality/Water Pollution ; Wells
  • Is Part Of: Hydrogeology journal, 2009-07, Vol.17 (5), p.1175-1187
  • Description: Large diameter fully cased wells that gain water from the bottom are often dug in sandy and collapsible aquifers. They have cylindrical vertical walls lined with brick or concrete. The well bottom is partially filled with aquifer material through which the flow is vertically upward. When the vertical hydraulic gradient reaches a critical value, quicksand occurs and the well structure can be destroyed. Another difficulty encountered is drawdown in the wellbore and the drying up of the well. To overcome these problems, the flow around and beneath these wells is numerically simulated. The simulation results are used to investigate the effect of well and aquifer parameters on quicksand and drawdown. For practical purposes, the dimensionless drawdown-time and dimensionless vertical gradient-time curves are developed. It was found that the ratio of filling material thickness to well radius affects the shape of these type curves. The type curves may be used to predict the time after pumping commences when quicksand occurs and the well dries up. They are also useful to design the safe pumping rate and duration as well as the optimum well radius. These are demonstrated by analyzing the pumping test data from a case study in the arid Chah Kutah region, southern Iran.
  • Publisher: Berlin/Heidelberg: Berlin/Heidelberg : Springer-Verlag
  • Language: English
  • Identifier: ISSN: 1431-2174
    EISSN: 1435-0157
    DOI: 10.1007/s10040-008-0426-7
  • Source: AUTh Library subscriptions: ProQuest Central
    Alma/SFX Local Collection
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